I've got a scandium model 340Sc with the titanium cylinder (.357 mag). I clean the cylinder with Breakfree CLP and a toothbrush, never a bronze brush. The barrel on my pistol is marked no bullets less than 125 grains, this to avoid bullets pulling due to inertia. I haven't tried lead bullets but usually shoot the 135 grain Gold Dots in .38 Spl due to the extreme recoil of the .357 round. The only setback I've experienced was when I tried to shoot CCI snake shot loads through the revolver and the shot capsules popped right out and I had to push them back in with my finger. I would experiment with any load at the range to determine reliability before using them as a carry load.